UAV (Unmanned Aerial Vehicle) is effective for remote sensing and obtains high-resolution data at low cost rather than satellite images and aerial photos. However, there is a lot of remote sensing with satellite information, while there is a little remote sensing with UAV photogrammetry. Then the authors researched a present state of UAV and applications for civil engineering. The objectives of this study was to construct a 3D model, to make orthogonal photos, and to calculate NDVI, NDWI, chlorophyll-a, and turbidity distributions and water catchment areas from UAV photogrammetry. In this paper, the authors introduced 3 examples for remote sensing with UAV and discussed possibility of the future on UAV.